Yes

you do need a jacket based on the weather in (Archway), England, United Kingdom 1 second ago

Why? Because it's so windy, even the squirrels are holding onto branches for dear life!
64°F18°C & Cloudy

Wind is 9 mph15 km/h from the West, gusting to 21 mph33 km/h
July 5
7pm64°F18°C9 mph15 km/h WestCloudy
8pm62°F17°C9 mph14 km/h WestPartly Cloudy
9pm61°F16°C8 mph13 km/h WestPartly Cloudy
10pm60°F16°C7 mph12 km/h SouthwestCloudy
11pm60°F16°C7 mph11 km/h SouthwestCloudy
July 6
12am60°F16°C6 mph10 km/h SouthwestCloudy
1am60°F16°C6 mph10 km/h SouthwestCloudy
2am61°F16°C6 mph10 km/h SouthwestCloudy
3am63°F17°C7 mph11 km/h SouthwestCloudy
4am64°F18°C7 mph11 km/h WestCloudy
5am66°F19°C7 mph12 km/h WestCloudy
6am66°F19°C8 mph13 km/h WestCloudy
DateLowHighWindDayNight
July 462°F17°C72°F22°C8 mph13 km/h from SouthwestCloudyMostly Cloudy
July 560°F16°C70°F21°C9 mph14 km/h from WestRainRain
July 656°F13°C69°F21°C10 mph17 km/h from NorthRainMostly Clear
July 753°F11°C74°F23°C7 mph12 km/h from NorthwestMostly ClearMostly Clear
July 854°F12°C77°F25°C4 mph7 km/h from NorthwestMostly ClearClear
July 960°F16°C83°F28°C2 mph4 km/h from NorthwestMostly ClearClear
July 1062°F17°C83°F28°C5 mph8 km/h from SoutheastMostly ClearMostly Clear

No

Low of 60°F16°C, High of 70°F21°C
Wind: 9 mph14 km/h
Precipitation: 62% rain

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